#highlatitudedust — Public Fediverse posts

@phonner @sargasso

I see value in a good search function. In my case, I like to find good case studies in satellite images and add a hashtag. When I need a list, I just search for the tag and get a list of those cases. I did improve my work with the addition I share openly how I work as a scientist. This function is available in the bird and not here.

I've been trying to do 8t here see for ex #highlatitudedust but the experience is not quite as good as like in the bird yet.

#Sunrise over #Patagonia today, with continuous #highlatitudedust activity (posted about it last 2 days) with abundant snow farther south.

This illustrates that dust storms (or more generally, dust activity) can happen in cold weather and during the winter.

#biogeochmicalcycles
#paleoclimate

Sunrise in #Patagonia today and there is a very long plume of #highlatitudedust from dry lake Colhué Huapi.

The long plume indicates that activity started during nighttime and it's been active for several hours.

In color is the Aerosol Optical Depth , a proxy of concentration that it is used to derive particle matter amount (dust mass cannot be directly measured from space)

#paleoclimate #biogeochemicalcycles #dust

#Argentina has a vast extension and it's been going through a major drought in the last couple of years.

The other day reported #highlatitudedust activity in the #Patagonia desert in the south region.

But also on the same day, the receding briny shores of the lake #MarChiquita (yellow arrow) was also emitting #dust . this area is just north of the country's most productive agricultural area .

Note that dust emission in this case occurs because the presence of different synoptic systems.

The same #highlatitudedust event I reported about yesterday in #Patagonia as seen by the #GOES satellite

This morning in #Patagonia, #highlatitudedust activity from several dry lakes (including the large dry bed Colhué Huapi) . Long dust plumes.

The winds are such that dust initially moves east and then veers south making likely this dust will reach the #SouthernOcean and maybe #Antarctica.

This is a good example of dust activity in the middle of the winter (there is even snow not too far south , red circle)

#paleoclimate #biogeochemicalcycles

One of the pathways of intercontinental transport in the #SouthernHemisphere is shown in today's GOES image with surface winds.

Southbound winds provide no only the lifting mechanism for dust in the #Patagonia desert but also the rapid delivery to the Antarctica Pla. This is not the most common pattern but it does happen and more importantly it is super effective because the short distances involved.

Even in winter, Patagonia desert is so dry that #highlatitudedust emission occurs.

Back from a spring break vacation, I resume my postings with an image of #highlatitudedust cloud coming of mud flats in the southern tip of Argentina (54S).

Also, including surface wind forecasts which suggest transport of the air mass to the Antarctica Pla. While it does not look like a lot of dust in this case, it illustrates a likely mechanism of rapid dust transport to Antarctica.

#paleoclimate #biogeochemicalcycles

#highlatitudedust activity today in Patagonia as seen by the ISS and GOES at the same time, and by MODIS-Aqua about an hour later (with ISS track in pink).

#highlatitudedust activity this morning in the southern tip of South America, laguna Blanca ,a dry salty pan, is emitting dust. Given the general pattern of wind direction, it looks likely that some of this dust will make it to the Peninsula.

#biogeochemicalcycles
#paleoclimate

A good example of #highlatitudedust activity in the south coast of #Iceland. It does not need to be hot and dry to have a dust storm.....

#highlatitudedust activity from a couple of day ago in Central Patagonia has brought a cloud of dust to the sub-antarctic South Atlantic

Mostly cloudy all day in Central Patagonia but by late afternoon, clouds moved and a clear view of dry lake Colhué Huapi shows #highlatitudedust activity bringing dust into the SW Atlantic

#highlatitudedust activity yesterday evening in Central Patagonia.

#highlatitudedust activity in the last few days in Patagonia, including smoke from fires in Chile but also from big fire by the coast, NW of Puerto Madryn.

Right now southern South America is a major contributor to hemispheric pollution: Abundant smoke from fires in #Chile and #Argentina. Add to it , major #highlatitudedust activity in Patagonia that generated a dust cloud spanning +1000km. All these have the potential to reach Antarctica.

Dust activity continuous into the night and given the winds (at least the surface ones) , it seems very likely that patagonian #highlatitudedust will reach the #WedellSea or Antartica Pla. by tomorrow

#paleoclimate
#biogeochemicalcycles

Today surface winds over Patagonia and Drake Passage illustrate a possible pathway by which #highlatitudedust emitted in the continent could quickly reach the peninsula and contribute to episodic dust events detected there (in addition to the local emission)

Two consecutive days with #highlatitudedust activity in Patagonia result in a significant large #dust cloud certainly reaching the south central S. Atlantic. Note it is large in extension, but concentrations are just high for the area but low compared to lower latitudes.

#biogeochemical
#paleoclimate

More #highlatitudedust activity this afternoon in Patagonia.

GOES Image from this morning of the SW Atlantic w/ large #highlatitudedust cloud (yellow) from yesterday's activity (red) with polar lows (red) and surface winds illustrates how #dust can get dragged straight south or into the SO depending the relative locations of the lows and the dust.
#paleoclimate
#biogeochemicalcycles

@zoom_earth

A study on sub-ocean core sediments reinforces the fact that the Patagonia desert was a major contributor to dust even into the near-Antarctica Pacific ocean during last glaciations.

https://www.pnas.org/doi/10.1073/pnas.2206085119

#highlatitudedust

Volcanic ash late yesterday in northern Patagonia. After 10 years of the Puyehue-Cordón Caulle volcano (VEI=5) eruption, the memory of that powerful eruption is still present and brought back through these events. 1/2
#highlatitudedust

#highlatitudedust activity today by sunset in central Patagonia.

Today sunrise over the SW Atlantic and pretty large dust cloud is over pretty much all over the Argentine Sea. #highlatitudedust

new year but same old, same old in #highlatitudedust activity in Patagonia, yesterday two distinctive sectors were actively sending dust to the SW Atlantic

Several #wildfires in #Argentina and #Chile yesterday early evening, produce enough smoke for long distance transport, clearly visible over the SW Atlantic (+ some #highlatitudedust from Patagonia) this morning , cloudy over SW Pacific, no direct view of smoke but probably it is there above clouds.

#forestfires #dust

#highlatitudedust activity in Tierra del Fuego , tip of South America, difficult scene for #dust detection by algorithms because the presence of high cirrus, which optically can resemble dust.

NASA's aerosol DT algorithm looks like picked up more at 3km resolution than at 10km but still I do not think they captured enough of it.

This is an example, why sometimes dust activity in this part of the world is often overlooked.

This morning in the southern tip of Patagonia, more #highlatitudedust activity , this time from shallow dry seasonal lakes. These dust sources and possible impacts in downwind ecosystems were studied recently by Nico Cosentino
in this paper https://doi.org/10.1029/2020JG006073

#dust #biogeochemistry

#highlatitudedust from Patagonia clearly reaching the islands yesterday.

Because their location they are a great spot for studies in the Southern Ocean.

#biogeochemistry